List of winners of the Scottish League One and predecessors

A national third tier of Scottish league football was first established in the 1923–24 season, as Division Three, it only lasted for two full seasons due to financial difficulties. There was again a third tier league in 1946–47 with the C Division, which also included reserve teams of the clubs from the divisions above, Division C operated as a national competition for the first three seasons thereafter it was split into two regional sections until season 1954–55 when the third tier was once again abolished.

34 different clubs, including reserve teams as separate clubs, have won the third tier of Scottish football. Three clubs (Clyde, Partick Thistle and Rangers) have won the third tier with both their first team and their reserve team. Clubs no longer active are denoted in italics.